I joined Daniel Piotti's channel as well, and asked him if his videos were PPV or free. He wrote back and said it's about evenly split.
I wish these guys would be forthcoming and let potential subscribers know they charge an additional fee for some of their videos. Those without PPV mention it in their write-ups; why can't those with PPV do the same? I find it unfair as there is no way of knowing unless someone tells you or, like me, you end up subscribing and are disappointed.
Agree with you - it's not reasonable.